I use OpenCPN to create my routes, then download them into my Garmin 72H. When you activate the route, it basically points you to the next waypoint (in a variety of ways, "road view", follow-the-arrow etc). When you get near the waypoint, it flicks to the next one and so on. Pretty simple stuff, then reverse the route for the way home.
1974 C&C27 MkII
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